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Except that the point of this thread is to stop and set up the solar array so it charges the battery while the OP is at work.  Or, in other words, while the rider is off doing something else, like exploring.  Not to mention the benefits of having an alternate energy source to combat running out of energy miles away from a recharge station.  [ ] <~~~~ Think out of it.

Yet, in an area with no grid, there's not much choice, is there?  The fact that you're using a single 180W solar panel rather defeats your point; if your company were to use a larger array, it wouldn't take so long.  As well, 180W in one panel is 70W less efficient than the technology currently available.  Also, I don't see the point in neglecting batteries as a power dump, considering that's the only way the system would be useful at night.  The battery bay for such a project would be less expensive than the rest of the kit.  As well, with proper positioning and stacking, a ~6.4 kW solar array can be installed into the area of four 2x2 parking spaces.

Hense, "naturally powered."  I figure, at this stage, how many EV vehicles are really going to be going through an interstate?  Hopefully enough to show the benefits of a system like this, but truthfully not too many.  If Zeros have up to a 10 kWh battery, and a Tesla S has up to an 85 kWh, how much would an off-grid station need to be able to give each day?

Well, for 30 bucks, it couldn't hurt to try.  One day.

Though building a step-down transformer sounds fun...